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UNITED STATES Parnn'r @rrrca.

HARRY L. HAAS, OF NEW YORK, N. Y., ASSIGNOR TO THE ZUOKER & LEVETTCHEMICAL COMPANY, OF SAME PLACE.

POLISHING CCMPOSITION.

SPECIFICATION forming part of Letters Patent No. 331,632, dated December1, 1885.

Application filed October 24, 1884. SerialNo.1-l6,397. (No specimens.)

To all whom it may concern.-

Be it known that I, HARRY L. HAAS, a citizen of the United States,residing in the city and county of New York, in the State of New York,have invented certain new and useful Improvements in PolishingCompositions; and I do hereby declare that the following is a full,clear, and exact description of the invention, which will enable othersskilled in the art to which it appertains to make and use the same.

This invention relates more particularly to polishing compositionsdesigned for use in preparing buffers or buff-wheelsfor polishing; butit may be used on other devices employed for that purpose. Polishingcompositions for that purpose require two apparently inconsistentqualifications-first, that they should adhere tenaciously to the buff,so as not to be too rapidly dissipated by the quick revolutions of thebuff and the friction incident to polishing, and the other that theyshould not adhere tenaciously'to the work polished, but be readilyremovable therefrom. In addition to these, they must also be cheap, inorder to be used practicaily. Polishing compositions as heretofore madefor such purposes have generally consisted of tallow or similar fats asa base, into which have been worked polishing materials-such as emery,tripoli, crocus, rouge, or other polishing materials, or a mixture ofsuch materials-and then the composition has been formed in molds orframes, the stick form being one of the most convenient shapes for use.Such composition is held to the polishing device While in motion untilenough has adhered thereto for the purposes required. Such combinationforms a convenient com pound for holding together the polishingmaterials and causing them to adhere to the wheel. The principalobjections to these compositions are the expense of the base and thedifficulties in getting such compositions out of the depressions andinterstices of the articles polished thereby. I have for a long timebeen engaged n making investigations and experiments with a view tofinding something that will not be open to these objections, somethingthat will be cheap, capable of being readily used, adhesive to thelouder, and also readily cleansed from the work that is polished. I

have found that tar alone, or with oils, or with stearic acid or otherof the hard fats, used in combination with polishing materials, producesa polishing composition that can be cheaply made and easily removed fromthe an ticles on which it is used.

The best way to prepare my composition is to take tarcoal-tar is as goodas any, and is cheapest; but I have found all kinds of tar to give goodresults and warm or heat it in a suitable vessel until it is of suchconsistency that the polishing materials can be readily in corporatedwith it, and then work in any such materials that may be desired. I havefound the composition so made. to be very adhesive to the wheel, beingmore tenacious than other compositions now in use, which is a greatadvantage. I have also found that for some reason, but what I am notcertain, although I believe because of the ready volatility, underfriction, of some of the constituent elements of tar, portions of thecomposition adhering to the work after polishing are very easilyremoved, and that the work presents a brighter and more attractiveappearance than when any of the compositions heretofore in use have beenapplied. I have also found that this desirable property of the tar is tosome extent communicated to a mixture of tar and fats; that acomposition, say, of two-thirds tar dissolved in one-third oil or oftwo-thirds tar dissolved in one-third t-allow, stearine, stearic acid,or other of the solid fat-s, heated, with the polishing materials added,will produce a composition that will be quite as good as when the taralone is used, and for some purposes even better. A larger or smallerproportion of the oils or fats may be used, if desired; but I have foundthat the proportions indicated produce the best results for generalwork. By such a combination I am therefore enabled to produce acomposition of the consistency of tar, and if a softer composition isdesired I can produce that by the addition of oil to the tar to bring tothe proper consistency. On the other hand, if a composition harder thantar is required, I add some of the solid fats.

The softer compositions may be packed in boxes or any suitable vessels,and the harder IOO forms may be pressed or molded into any de- 2. Apolishingcomposition consisting of a IO sired shape. base or vehicle'oftar, in combination with Having thus described my invention, what fattysubstances and polishing materials, sub- I claim as new and desire tosecure by Letters stantiall y as described. 5 Patent, is

T 1. A polishing composition consisting of a HARE HAAS' base or vehicleof tar, in combination with WVitnesses:

suitable polishing materials, substantially as ALEXANDER LEVET'r,

described. CHAS. LOEB.

